Denver Broncos running back Quentin Griffin attempts to run past Houston's Marcus Coleman, left, and Anthony Dunn in the first half on his way to a 54-yard rushing night in the Broncos' 31-17 preseason win against the Texans at Invesco Field at Mile High. Griffin, a second-year running back from Oklahoma, also scored a touchdown on a 6-yard run. The touchdown was the first scored by the Broncos' starting offensive unit this season.